The 31-year-old has been looking for a new club since he was released on a free transfer by PSG in November 2010.
“Having played the majority of my career in Europe I wanted a new challenge in my life,” Kezman told southchinafc.com.
“The opportunity to play for South China excites me and I feel I can offer the team many things. I have maintained fitness over the winter and feel ready to play and score goals.
“I want more success in my football career and believe South China FC can bring that, I have spoken to the manager and seen the team play and I believe this is the right club for me, I’m confident this will be a fantastic experience for all involved.”